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Subject[PATCH 1/3] iio: adc: meson-saradc: squash and share the common adc platform data
Date
Extract and promote common adc platform data into a new structure,
to make it better share the info between several SoCs,
this will avoid duplicating the code all over the place,
Save a few memory and make the code more maintainable.

Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
---
drivers/iio/adc/meson_saradc.c | 75 +++++++++++++++++++++++-------------------
1 file changed, 42 insertions(+), 33 deletions(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 29fa7736d80c..799ed929ab99 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -219,15 +219,19 @@ enum meson_sar_adc_chan7_mux_sel {
CHAN7_MUX_CH7_INPUT = 0x7,
};

-struct meson_sar_adc_data {
+struct meson_sar_adc_param {
bool has_bl30_integration;
unsigned long clock_rate;
u32 bandgap_reg;
unsigned int resolution;
- const char *name;
const struct regmap_config *regmap_config;
};

+struct meson_sar_adc_data {
+ const struct meson_sar_adc_param *param;
+ const char *name;
+};
+
struct meson_sar_adc_priv {
struct regmap *regmap;
struct regulator *vref;
@@ -276,7 +280,7 @@ static int meson_sar_adc_calib_val(struct iio_dev *indio_dev, int val)
/* use val_calib = scale * val_raw + offset calibration function */
tmp = div_s64((s64)val * priv->calibscale, MILLION) + priv->calibbias;

- return clamp(tmp, 0, (1 << priv->data->resolution) - 1);
+ return clamp(tmp, 0, (1 << priv->data->param->resolution) - 1);
}

static int meson_sar_adc_wait_busy_clear(struct iio_dev *indio_dev)
@@ -328,7 +332,7 @@ static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev,
}

fifo_val = FIELD_GET(MESON_SAR_ADC_FIFO_RD_SAMPLE_VALUE_MASK, regval);
- fifo_val &= GENMASK(priv->data->resolution - 1, 0);
+ fifo_val &= GENMASK(priv->data->param->resolution - 1, 0);
*val = meson_sar_adc_calib_val(indio_dev, fifo_val);

return 0;
@@ -447,7 +451,7 @@ static int meson_sar_adc_lock(struct iio_dev *indio_dev)

mutex_lock(&indio_dev->mlock);

- if (priv->data->has_bl30_integration) {
+ if (priv->data->param->has_bl30_integration) {
/* prevent BL30 from using the SAR ADC while we are using it */
regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,
MESON_SAR_ADC_DELAY_KERNEL_BUSY,
@@ -473,7 +477,7 @@ static void meson_sar_adc_unlock(struct iio_dev *indio_dev)
{
struct meson_sar_adc_priv *priv = iio_priv(indio_dev);

- if (priv->data->has_bl30_integration)
+ if (priv->data->param->has_bl30_integration)
/* allow BL30 to use the SAR ADC again */
regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY,
MESON_SAR_ADC_DELAY_KERNEL_BUSY, 0);
@@ -557,7 +561,7 @@ static int meson_sar_adc_iio_info_read_raw(struct iio_dev *indio_dev,
}

*val = ret / 1000;
- *val2 = priv->data->resolution;
+ *val2 = priv->data->param->resolution;
return IIO_VAL_FRACTIONAL_LOG2;

case IIO_CHAN_INFO_CALIBBIAS:
@@ -630,7 +634,7 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev)
*/
meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_CH7_INPUT);

- if (priv->data->has_bl30_integration) {
+ if (priv->data->param->has_bl30_integration) {
/*
* leave sampling delay and the input clocks as configured by
* BL30 to make sure BL30 gets the values it expects when
@@ -710,7 +714,7 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev)
return ret;
}

- ret = clk_set_rate(priv->adc_clk, priv->data->clock_rate);
+ ret = clk_set_rate(priv->adc_clk, priv->data->param->clock_rate);
if (ret) {
dev_err(indio_dev->dev.parent,
"failed to set adc clock rate\n");
@@ -723,14 +727,15 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev)
static void meson_sar_adc_set_bandgap(struct iio_dev *indio_dev, bool on_off)
{
struct meson_sar_adc_priv *priv = iio_priv(indio_dev);
+ const struct meson_sar_adc_param *param = priv->data->param;
u32 enable_mask;

- if (priv->data->bandgap_reg == MESON_SAR_ADC_REG11)
+ if (param->bandgap_reg == MESON_SAR_ADC_REG11)
enable_mask = MESON_SAR_ADC_REG11_BANDGAP_EN;
else
enable_mask = MESON_SAR_ADC_DELTA_10_TS_VBG_EN;

- regmap_update_bits(priv->regmap, priv->data->bandgap_reg, enable_mask,
+ regmap_update_bits(priv->regmap, param->bandgap_reg, enable_mask,
on_off ? enable_mask : 0);
}

@@ -842,8 +847,8 @@ static int meson_sar_adc_calib(struct iio_dev *indio_dev)
int ret, nominal0, nominal1, value0, value1;

/* use points 25% and 75% for calibration */
- nominal0 = (1 << priv->data->resolution) / 4;
- nominal1 = (1 << priv->data->resolution) * 3 / 4;
+ nominal0 = (1 << priv->data->param->resolution) / 4;
+ nominal1 = (1 << priv->data->param->resolution) * 3 / 4;

meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_VDD_DIV4);
usleep_range(10, 20);
@@ -881,48 +886,52 @@ static const struct iio_info meson_sar_adc_iio_info = {
.read_raw = meson_sar_adc_iio_info_read_raw,
};

-static const struct meson_sar_adc_data meson_sar_adc_meson8_data = {
- .has_bl30_integration = false,
- .clock_rate = 1150000,
- .bandgap_reg = MESON_SAR_ADC_DELTA_10,
- .regmap_config = &meson_sar_adc_regmap_config_meson8,
- .resolution = 10,
- .name = "meson-meson8-saradc",
-};
-
-static const struct meson_sar_adc_data meson_sar_adc_meson8b_data = {
+static const struct meson_sar_adc_param meson_sar_adc_meson8_param = {
.has_bl30_integration = false,
.clock_rate = 1150000,
.bandgap_reg = MESON_SAR_ADC_DELTA_10,
.regmap_config = &meson_sar_adc_regmap_config_meson8,
.resolution = 10,
- .name = "meson-meson8b-saradc",
};

-static const struct meson_sar_adc_data meson_sar_adc_gxbb_data = {
+static const struct meson_sar_adc_param meson_sar_adc_gxbb_param = {
.has_bl30_integration = true,
.clock_rate = 1200000,
.bandgap_reg = MESON_SAR_ADC_REG11,
.regmap_config = &meson_sar_adc_regmap_config_gxbb,
.resolution = 10,
- .name = "meson-gxbb-saradc",
};

-static const struct meson_sar_adc_data meson_sar_adc_gxl_data = {
+static const struct meson_sar_adc_param meson_sar_adc_gxl_param = {
.has_bl30_integration = true,
.clock_rate = 1200000,
.bandgap_reg = MESON_SAR_ADC_REG11,
.regmap_config = &meson_sar_adc_regmap_config_gxbb,
.resolution = 12,
+};
+
+static const struct meson_sar_adc_data meson_sar_adc_meson8_data = {
+ .param = &meson_sar_adc_meson8_param,
+ .name = "meson-meson8-saradc",
+};
+
+static const struct meson_sar_adc_data meson_sar_adc_meson8b_data = {
+ .param = &meson_sar_adc_meson8_param,
+ .name = "meson-meson8b-saradc",
+};
+
+static const struct meson_sar_adc_data meson_sar_adc_gxbb_data = {
+ .param = &meson_sar_adc_gxbb_param,
+ .name = "meson-gxbb-saradc",
+};
+
+static const struct meson_sar_adc_data meson_sar_adc_gxl_data = {
+ .param = &meson_sar_adc_gxl_param,
.name = "meson-gxl-saradc",
};

static const struct meson_sar_adc_data meson_sar_adc_gxm_data = {
- .has_bl30_integration = true,
- .clock_rate = 1200000,
- .bandgap_reg = MESON_SAR_ADC_REG11,
- .regmap_config = &meson_sar_adc_regmap_config_gxbb,
- .resolution = 12,
+ .param = &meson_sar_adc_gxl_param,
.name = "meson-gxm-saradc",
};

@@ -999,7 +1008,7 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
return ret;

priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
- priv->data->regmap_config);
+ priv->data->param->regmap_config);
if (IS_ERR(priv->regmap))
return PTR_ERR(priv->regmap);

--
2.15.1
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